<template>
    <div class="goodsinfo-container">
        <!-- 图片轮播区域 -->
        <transition
        @before-enter="beforeEnter"
        @enter="enter"
        @after-enter="afterEnter"
        >
            <div class="ball" v-show="ballFlag" ref="ball"></div>
        </transition> 
        <div class="mui-card">
            <div class="mui-card-content">
                <div class="mui-card-content-inner">
                    <swiper :lunbolist="lunbo" :isFull="false"></swiper>
                </div>
            </div>
        </div>

        <!-- 图片购买区域 -->
        <div class="mui-card">
            <div class="mui-card-header">{{goodsinfo.title}}</div>
            <div class="mui-card-content">
                <div class="mui-card-content-inner">
                    <p class="price">
                        市场价：<del>￥{{goodsinfo.market_price}}</del>&nbsp;&nbsp;销售价：<span class="price_now">￥{{goodsinfo.sell_price}}</span>
                    </p>
                    <p>购买数量：
                        <numbox @getCount="getSelectedCount"></numbox>
                        <!--
                            点击购买是输入goodsInfo组件
                            购买数量属于 cmtbox组件
                            子组件向父组件传值
                        -->
                    </p>
                    <p>
                        <mt-button type="primary" size="small">立即购买</mt-button>
                        <mt-button type="danger" size="small" @click="addCar">加入购物车</mt-button>
                    </p>
                </div>
            </div>
        </div>

        <!-- 图片参数区域 -->
        <div class="mui-card">
            <div class="mui-card-header">商品参数</div>
            <div class="mui-card-content">
                <div class="mui-card-content-inner">
                    <p>商品货号：{{goodsinfo.goods_no}}</p>
                    <p :max="goodsinfo.stock_quantity">库存情况：{{goodsinfo.stock_quantity}}件</p>
                    <p>上架时间：{{goodsinfo.add_time | dateFormat}}</p>
                </div>
            </div>
            <div class="mui-card-footer">
                <mt-button type="primary" size="large" plain @click="goDesc(id)">图文介绍</mt-button>
                <mt-button type="danger" size="large" plain @click="goComment(id)">商品评论</mt-button>
            </div>
        </div>
        



    </div>
</template>
<script>

import swiper from '../subcomponents/swiper.vue'
import numbox from '../subcomponents/goodsinfo-number.vue'

export default {
    data() {
        return {
            id: this.$route.params.id,   //将路由参数对象中的id挂载到data上
            lunbo: [],                     //轮播图的数据
            goodsinfo:{},                   // 获取到的商品信息
            ballFlag: false,                //购物车小球的显示隐藏
            selectedcount: 1,                    //保存用户选中的商品数量，默认1
        }
    },
    created() {
        this.getsLunbotu();
        this.getGoodsInfo();
    },
    methods: {
        // /api/getthumimages/:imgid
        getsLunbotu() {
            this.$http.get('http://www.liulongbin.top:3005/api/getthumimages/' + this.id ).then( result => {
                if( result.body.status === 0){
                    result.body.message.forEach( item => {
                        item.img = item.src;
                    })
                    this.lunbo =  result.body.message 
                }
            }) 
        },
        getGoodsInfo() {
            this.$http.get('http://www.liulongbin.top:3005/api/goods/getinfo/' + this.id ).then( result => {
                if( result.body.status === 0){
                    console.log(result.body)
                    this.goodsinfo =  result.body.message[0] 
                }
            })
        },
        goDesc(id) {
            this.$router.push({name:'goodsdesc',params:{ id }})
        },
        goComment(id) {
            this.$router.push({name:'goodscomment',params:{ id }})
        },
        addCar() {
            this.ballFlag = !this.ballFlag;
            // 拼接出一个，要保存到state中的car数组里的商品信息对象
            var addcargoodsinfo = {
                id:this.id,
                count:this.selectedcount, 
                price:this.goodsinfo.sell_price,
                selected: true
            }
            //调用store中的mutations,来将商品加入购物车
            this.$store.commit('addTocar',addcargoodsinfo)
        },
        beforeEnter(el) {
            el.style.transform = "translate(0,0)";
        },
        enter(el,done) {
            el.offsetWidth;   //  加上它才有动画


            //获取小球在页面中的位置
            const ballPosition = this.$refs.ball.getBoundingClientRect();
            //获取购物车徽标在页面中的位置，不同组件，id也可以获取到元素
            const badgePosition = document.getElementById('badge').getBoundingClientRect();
            const xDist = badgePosition.left - ballPosition.left;
            const yDist = badgePosition.top - ballPosition.top;

            el.style.transform = `translate(${xDist}px,${yDist}px)`;
            el.style.transition = "all .6s cubic-bezier(.4,-0.3,1,.68)";
            done();  //afterEnter函数的引用

        },
        afterEnter(el){
            this.ballFlag = !this.ballFlag;
        },
        getSelectedCount(count) {
            console.log('父组件拿到的数量值为'+this.selectedcount);
            this.selectedcount = count;
        }
    },
    components: {
        swiper,
        numbox
    }

    
}
</script>

<style lang="scss" scoped>
    .goodsinfo-container{
        background-color: #eee;
        overflow: hidden;
        .price_now{
            color:red;
            font-size:16px;
            font-weight:bold
        }
        .mui-card-footer{
            display: block;
            button{
                margin: 10px 0;
            }
        }
        .ball{
            width: 15px;
            height: 15px;
            background-color: red;
            border-radius: 50%;
            position: absolute;
            left:150px;
            top:390px;
            z-index:99;
        }
    }
</style>


